Rock-drill.



PATENTB'D JAN?, 19.08.

R. S. TROTT. ROCK DRILL.

APPLICATION FILED smxm, 1906. y

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ROLLAND S'. TROTT; OF'DENVER,QCOJ0RADOI. Y "1.1

ROCK-DRILL.'

Tqltlwhom it may concern." Be it knownthat I, ROLLAND SQ TROTTI, afpitizenof the United States ci America, residing in thel city and county of DenveraiidiS'tate of Colorado, have invented a new and useful Rockflfhfill, of 'which' the rfollowingis av specification'.

My inventionfrelatesfto a drillebitlholdingand rotatingme'chanisrn for rock-drillingy engines, and the objects of myinvention are: First, to provide a drillllbit holding-chuck, having'means whereby an operatorcan Inanuallyand instantlyinsertiand lock a rockcnttingdrilhbitto a rock-drilling engine, or

can' man ua'lly and instantly liinlock and 1remove a rock-cutting dril-l-bitfroma rock engine., Second, to

anism illustrated in the accompanying drawings, ,in which: f f

Figure. 1, is a lon itudinal sectional-view of la portion of adril ing engine, showing the applicatipn oilily-improved cliuck.` Fig. 2,-

is.A a.transversel sectional i View on- -the line 2&2 .of Fig. l. Fig.` 3, is a similar view on the line 3 3 of Fig. 1. Fig. 4; isfa! plantview of a portion of the chuck, showingthe clutch Awhich connects it toi-thev actuating ratchet wheel. Fig., 5, is a transverse, sectional View, showing aclamping deviceior` securing one endcf a hose to ahollow vdrill` .the-'front end-ofthe piston lar enough to enteraspirally tinted and rifled sleeve. 5, in' Awhich itis closely fitted but reciprocally Specieatiqn of Letters-Patent.. w Application filed September-14,1906- Ssrial No.l33d.659` I l' with an axial bore 7, surrounding t "e ham-v merfbar, the inner peri heral 'surface of which is provided with spira j groovedteetht'jand the pistonl is heldagainstrotative movement by lugs 7B-on ,its sides, which' reci y'rocfs'atef' in ,slidoways -in the cylinder. -The s ank'end ofthe. rockcutting drillbit rejects loosely in the frontend of saidriiie sleeve into the' reciprocal pathV ci' the hammer bar 'of Ttlie piston, f

The sleeve 5, has a huh 8,A whichis"rotata-y bly-'mounted in an axial bore of thefront cyl-f4 inder head, and from this hulr projects a, circular head or collar 9', which liefs he here of a hub: 10, which proj ectsl'ro'm'the inder head. 'The peripheral" siirfacef offthe rear end of this sleeve isprovided with' spiral rifle teeth, `which extend 'loosely into *the spirally-grooved. bore 7, of the'piston; "Tlie entrance to. the hub' ofthe cylinder he'adfis threaded, and Vsleeve 1 1" is threaded "Lto' it which extends to close to' thefface edgefo through an laxial hole in thelwa'sherl 2 In recessesformednthe liea'd "9, L place three pawls .14gwhich are providedwith tri'innions which are"piv ota lly jonrnaled i'n mall -liesa short distance iomthefshilder 17 etween the two hores, "a'ndj 'the chunk iscmoved forward its" mdve en'tw'ill drill-hit 6. cylinderis' also rovide'd' i i 35 hit.4 Fig. 6, is a side view ofFig. 5, showing holes formed in thehead'of' the riffleb'a're0* a hose extending from the end of the chuck, sleeve;v and in the washer 1 2. yThe sleevell tothe clamping device on the drill bit, and screws tightly up. 'against`-v the faceY of liig. l7 is a-sectio'nalview oa fragment ofthe washer 12, and-seoureszthe washer between 1 cylinder of the drillingengineand piston. theend oi 4theeleeve and theendo'the'head 40 Fig.` 8 is a iront elevation of the chuck cap. 9.1 This sleeve-,is providedf .wi tli"' an axial 95V Similar letters of reference refer tosimilary bore'ofj'two diameters lyandflfthebbre 15 parts .,fthroughont theseveraliviews, of larger-diameter being in itsinneijend, 1 Referring to the drawings, the numerall; a. snolilder- 17 :is: formedfa'tthejf tiony of designates the cylinder of a rock-drilling erel these-'two axial Ibores. I "f l 5 .4 ineeQ, the Pfront cylinderV head, which-'is In thel bottomofthelargest hre I lace "100 loltedto the front end of the: cylinder casing.' the inner. end offaj drill-holdingehue fthe The.f .cylinder is provided with' a,piston v 3, "innert end of whichis in the form o iacollar 'which is 'provided with 'a drilLbit striking- "1' ,which larger'in diameter than the'lQOdY 'bar I'which I. terin the hammer har,` and A oithe 'chuck and ,extend'siiY finto. t "larger which is 'madelong enough to projeet'gbeyoiifd axial"`bore` off this sleevfenj his 'colla ,"'noi- "-105 1.32:.; mounted, and `its iront end isarranged and; adapted to strike the shank of'a rock-cuttmg` -pear byv reference'` tothe drawings. e "110 i body of thischuck extends from this shoulder beyond the end of the sleeve 11, a short distance, and it is made enough smaller in diameter than the `sleeve to permit a sleeve 20, to be mounted uponit, which sleeve l term the ychuck actuating sleeve, and it is made to fit closel Abut slidably in the sleeve 11, and over the od of the chuck, its inner end bein against t e collar` 19, While its outeren extends a short distance bevond the outer end of the sleeve 11. The sleeve 20, is provided With aiin er grasping in 21, which extends up throng a s1ot22, ormed of the sleeve 1]., `the inner end o which s ot is provided with a short right-angled bend 23, into which the in slldes'by turning-the actuating ring, .an isv `locked against accidental longitudinal displacement. The drill chuck, the rie sleeve,

and the ratchet Wheel are each'provided with an axial bore, that isl adapted to receive and l t snugly but loosely the hammer striking end othe shank of the rock-cutting -drillbit,and the inner end of the chuck is' coun- `terbored and threaded, and a ring 24 is threaded .to it,`and` this ring is also provided ',With an axial bore -that fits loosely over the drill-bit.- VThis ri proects inwardly beyond theend of t e colar portion lor the ofratchet teeth 25, iforrned.

The outer end f ythe hub oi' the ratchet chuck, and in its edge a circumferential row.

lWheel 1,3, is also provided With a circumferential-row of ratchet teeth 26, that are op- .positelyalranged to the teeth in the edge of `the ring 24, and are adapted normally to engage the teeth of the ring of the chuck, thus ormingfa clutch connection 'between ithe 'chuck and the ratchet Wheel.

The rock-cuttingrdrillbit -may bel of an of the'coxnmonly used ty es, and its shank end is adapted to extend into the rifle sleeve into the reciprocal path of the hammer bar 4, of the piston hammer, and is kprovided ondiametrically opposite sides with projectin `lugs 27 Whic fare adaptedto ass throng recesses, 2,8, formed in a circular block '29,

that itsfinto a counter-bore formed in the outer end of the chuck, which block is con 4 the recesses V'28 in VtheI block 29, and Which l admit the lugs 27 of the dl'illbit.-` The drilliined in the chuck by a cap' 30,-;Which is threaded to the outside of the endof Vthe chuck and extendspver the ends ,o I' both chuck and block.I .This c H aperture 30, through Whic the drill bit passes,I and recessesV 28, ywhich register with y bit asses through an axial bore in this block.

` blockto kt e bottom of the counter-bore in the chuck, and a circular aperture '31, ex-` e recesses 28 arefmade t0 fit the drill-bit lugs loosel and extend entirely through the tends'longitudinally through theblock just above itsaxial bore, and a slot 32, extends from this` aperturejthrough the periphery o f-h has i an 'axial @rasee the block, and from its rear end to Within a short distance of its forward end. A slot 33, is also formed throu h the shell of the chuck to register with the s ot 32 of the block, and a locking bolt 3 4 is passed into the aperture 31, and is provided with a pin 35, which extends up through the slots 32 'and 33 into a circumferential slot 36, formed `in the inner periphery of -the chuckV actuating ring 20, Which allows the locking bolt to rotate with the chuck independent of the actuating rin but at the Sametime allows the locking bo t to slide in the aperture 31, by'ineanso the finger grasping'pin 21. yThis locking bolt extends beyond the inner end of 'the vblock 29, and into a' recess 37Y in the chuck concentric with its axial bore, 4a similar recess being` formed at a. diametrically opposite point,\and these recesses extend aroundA far enough to permit the drill-bits lugsf' after bei inserted through the recesses 28 of the bloc to be turned to one side farjenough to be out of the pathl of the locking bolt, and to bear a ainst the Walls. of the recesses 37, in order t at these Walls may contactttvith the lugs of the d rill-bit,`. and thus turn the said bit as the chuck rotates..

When a drillsbit` is inserted the chuck,

the b ock ,29, and into t e recesses? ofthe chuck, the finger grasping in 21,'having lits lu s are 'pass'edthrou h therecesses 28, of l first been moved forward, W ich moves the' actuating ring and the locking boltforward fari enough to. allow theupper lug l.to be/ Vturned past it against its engaging Wall, after which the locklng bolt is moved back to gether with the actuating ring, by the iinger in, Which is then turned and locked in its Aslot 23, and eil'ectuallylocks the drillbit to p .the chuck.`

l When it is desired to use -Water to eject the rockfcuttings from the rock-cutting lips 'of lthe drill-bit, When drilling holes in rock', -I use y 4 a drill-bit, with an axial aperture 38', extending into it'from its rock-cutting lips to `.Within 'a short distance of its opposite end', and at 'a the Vdrill is in positionfa transverse aperturev point on the. drillbeyond the chuck; 'when l39 extends throu' h the drill. shank'so as to y ,intersect 'the axia aperture, and through the hubofthe cylinder head and'sleeve 11, I

` form' an aperture 4:0, which connects with a circumferentialaperture 4-1, vformed in the end of the chucks actuating sleeve, which connects with-i, an aperture 42, exten 'ng throu h=the chuck, the block 29, and the cap 30. nipple 43, is threaded to thehole 42, and one end'vof a short section'ofhose 44, is secured to the nip le, and the other end 'of this hoseis secure to a clamp 45, 'which is secured tothe drill, over the ends ofthe transverse hole 39. This clamp comprises a ofy arms 46, which straddle the drill`, and are pivoted together abovth'e drill.l t One of the farms cai-ries a lug 47, vvhichts into one nipple side lugs, the sleeve is also rotated.

.the piston cr drilling engine, 45'

erase..

passim. ont through the hose i4-.1, to the drillhit. By the (r.onstrncti n the. chuck, drill bit, and lmse will revolve together, thus asmuling any twisting, ol the hose. The clamp is held in place by an. expansion spring '49, which lies between two upright lingers 50,

which are integral with the arms '46, and the pressure exerted by thespringl 49, canse-s the 4S and vlug 47, to be forced into the ends of the hole 39, and thus securely clamp the hose to the drill-bit. By gripping 'the lingers 50, and pressingl them together, the clamp may he removed.- 1

As the piston 'reriproeates in tlm-cylinder, its rifle grooved bore reciprocates on the ritled sleeve on the forward 'stroke ot the piston by its pawl running away from the teeth of the ratchetfwheel 13, hut on. the rear stroke of the piston, which is held from rotating by its and-its pawls .engage the ratchet Wheel and rotate it, and when the drilling. engineYis running, the

.chuck is thrown into and kept in engagement with the ratchet Wheel 13, 'by moving the chncks.actuatingring-rearward by means of thefinger graspingr pin 21, which nieves the ratchet teeth of the chuck into engagement with the ratchet-teeth of the ratchet wheel. The Chuckie thenlocked inengagenient with the ratchet ring, by turning the actuating ring, and moving. the pin into the rightangled or-'oflset slot 23. In case it is desired towithdraw a drill-bit from the chuck, and insert anew one, it .is not necessary tostop as it requires but afew seconclsto accomplish this, and it is only necessary toturn the finger pin and sleeve and move the pin. and sleeve outward, which draws the 'chuck out` of engagement withthe ratchet .teeth of the ratchet wheel, and at the saine timemoves the lockingliolt forward, so that itis onlynecessary 'for thel 4o'peratorto grasp. the-drill-bit, turn itslightly,

and withdraw itfrom thechujek, andinsert' another one, and-lock;v it in thcchuck and' throw the chuck into engagement with the .ratchet'w-he-el, which is still intermittently rotating, and lcclthe finger pin in its .offset slot.A r il.'

tljie-.sleeve 20, is thrown forwardli: tliepiriill,A it first .withdraws theloolt 34 s o as .to allofwthelugs on the drill to pass it as the drill. is turned when withdrawn or inserted,

-but whengthe end of the sleeve lcontacts with the capfBO, thefchnck will be.moved;fr )rward until theiend 19 contacts*with the shoulder.

' ratchet toothed p awll operatively.rotatea the combinatmn .u yof ...drill-bit, n'd a 1 -MTM? 11T ot the sleeve 11, whdlnth, chit ism will he ui'ir-.onpled,tandth closed lriwollir--HL l l My invention is :nlaptnglt smic operated .iroclifdrilliiwien particularly :.Ldapted for u,-v lerne gas operati-id. roel vented h v me and nnwjfli. Liates Patent (')flfice-.in "t t cation Ille-d September 333,279.

. Having described in claim as new and desire Patent, is:

1. ln a' rock drillfj wi the ut stopping. `the reciprocating non-rota therein, a pawl and rate drill-hitrotatingmecha piston, a-drill-bit inthe sc tp said piston, a drill-bit lnildi] tc hold'said drill-hit, anp, clutch device for thro 1 chuckV into or out of e drill-hitrotating,r mecha si and drill-hit rotating, tion.

2. In a rock dyeil without stopping th combination withan o cylinder, and areci piston,. o f ariled. "sl evei, a

ing chuck arranged. 1nl op said l drill-bit rotatiwe mech operatively suppe clutch surface .on mechanism, an op`A`n said clutch, and means 4said chuck-into andf c said drillhit rotativ ni" Ina rock-'drill to ,bits without stoppingfltlfi combinationwitha a rifle-sleeve, a 'ratchet chuck a mai'inallyloper i 4 ringV and linger Isin, av surfaces between sai Iing.,I l .4'. .In-a rock fdr-ill f' bits .without stoppin Frovided withv a .eliltcli I .wlding-.chuckpreie snrfaceonsaiddri li t as 'y a rock-drilling. engine Without stopping the nectedto` said sleeve b en ine, the combination of a drill- 1t, and a -bit striking and rotating mechanism,-

with Va vdrill holding chuck reciprocally mounted relative to said rotatable mechanism, means for manuall engaging said chuck withv and detaching it From said drill-bit rotatingrmechanism. y M

6. v he combination with the cylinder, of'a piston reciprocally and non-rotatably mounted therein, a rifled sleeve, a ratchet ring conspring-'controlled pawls, and a drill-bit hol ing chuck arranged to be manually connected and disconnected to 4andzfrom said ratchet rin 7. .The-.combination of a cyk inder vhaving a :forwardextensionthereon, a piston having a riiied a erture therein and provided with a forwar ly extending .hammer bar, a sleeve having a riiled exterior into which said hammer bar extends -and on which' said rilied `'aperture reciprocates, a ratchet wheel mounte in the forward extension of said cylinder,

"spring controlled pawls carried-by said sleeve to' engage said ratchet wheel, 'a clutch surfajce on said ratchet Wheel, a drill bit holding chuck reciprocall mounted'in said cylinder.

extension rovi ed with a clutch surface o posing t e clutch surface en said ratchet w eel, means including a finger gras' ing pin for moving and locking saidV chuckc ut`ch in engagement With-.the clutch on said ratchetv wheel, und: fm: disengaging said chuck clutch from the clutch onsaid ratchet l`Wheel, and means for substantiall attaching and releasing a drill-bit to from' said drillfholding chuck. v f

8. The combination of a cylindena piston,

a lrifle sleeve, 4and a drill-bit, the cylinder head having a hollow hub, a ratchet toothed ring, 'provided With a side face ratchet tooth clntchsurface, a drill-bit holding chuck slid- Y ab] 'amounted-to -fmove to and from said rac t'tothed ring andl -provided with a #ratchet -atoothed )clutch surface ada -ted to :fregisterinirthe clutch' surface of saiV ring, a.

drill-holdin'gchuck actuating ring surround- .ingsaid chuck loosely and connected thereto, asleeve connected to said cylinder head, -a slot through said sleeve abcve said ring, a finger grasping in extending up through i' said slot andsli able therein, and adapted with said actuating ring to move said chuck into or out of Aengagement with said ratchet clutch ring, an oisetslot in each end of said sleeve, in which sa'id pin ts, a recess in said chuck,means includ1ng a sliding bolt which is :revolubly connected to said actuating ring and said operating in, and lugs on said drill- -bit for instantly loc 'g or releasing said drillbit to or from said chuck.

9i The combination of a cylinder, apiston,

;a'drill bit, a chuck and a sleeve, a ratchet WhcelQhaving a clutch lsurface thereon, a washer-mounted on said ratchet rWheel,p avvls termittently 'for rotatably connecting said ockingl bolt to said actuating ring whereby said grasping pin and ring o eratively 'connect and disconnect said 'dr1 l-holding chuck to said ratchet toothed clutch ring.4

10. The combination With a c linder, a

cylinder head, a piston, and a dr` -bit, said drill bit having rojecting locking lugs on its shank end, n a Water passage in it 'to its rock-cuttin point, of a riled sleeve, a ratchet toothe ring rotatably mounted in said cylinder head yspring-contnolled pawls on sald ried sleeve for connecting said ratchet toothed ring to 'said'sleeve to be inrotated thereby, a clutch surface on said ratchet toothed ring, a' drillholding chuck reciprocally and rotatably mounted in said cylinder head and provided with' a clutch surface registering into said ratchet toothed rinfrs clutch suriace, means including a manually operated sliding member for moving said chuck to engage and release saidratchet toothed ring, said chuck provided with .recesses'arranged to receive' the lugs ci said drill-bit, and a slidin bolt connected to said manually operating s iding .member for releasably locking said drill-bit 'to said chuck, and lmeans provided 4With a Water. assage through said cylinder head and chuc for admitting Water to said drillbit Water passage;

11. In a roei( drin for4 rock-afslag en;

gines, the combination with a cylinder head, of a piston-o erated, rifled sleeve rotatably mounted t erein, a ratchet vWheel mountedv in Asaid sleeve, and awls in said sleeve for actuating said ratc et Wheely'a chuck having a clutch face, which is enga ed by a corres onding face on 'said ratc et wheel; and aving a cylindrical bore, the face of which chuck is provided with oppositely' ositioned concentric recesses; a b ock in saidp bore, having longitudinal holes which open into said recesses; a bolt in 'said block, which extends into one of said recesses in said chuck, a in in said bolt which extends through aline slots insaid block and said chuck; a sleeve on said chuck, having an inner peripheral groove in which said pin projects, and a Water channel. in its inner end, Vconnectin .with an inlet, and with a channel the channeled sleeve,` to Yunlcclr the clutch i mechanism, and close the Water inlet.

12. In a rock drill, the combinationivith a' drill hit havinge. shank provided With a side lug, of e.. chuck, ar rifle bar and piston having a reciprocating movement, and e cylinder,

connections Wlicrehyfthe Achuck ineyhe irl-'f termittently rotated step b vstep in seid cylinder 'by seid reciprocating movement of said ride oar and piston7 said chuck having an axial aperture adapted to receive the shank of said drill bit and having ir concen-v tric recess in which the side lug of seid drill adapted to receive the shanliol the drill hir, te, recessin ,the `end of seld chuck entendre hit provided with e side lug, and a, drill held ing chuck, connections between seid rifleber and said chuck `or rotating the letter, .iid chuck being' provided with en axial aperti concentricelly around. the exielbore of chuck adapted to receive the side lug of seid Adrill bit, and a can connected to the end of said c mcliproviced with en 'axial aperture adapted to admit said drill bit to4 seid chuck,

'but arranged out ofelineinent with the con-` centrica-lly extending end of seid lug receiving recess 1n said chuck.

In testimonyv whereof I affix my signature 'in presence of two Witnesses.

i ROLLAND S. TROTT.

'Witnesses z G. SARGENT ELLOTT, ADELLA. M, FOWLE. 

